Box or cover ending machine



Feb. 8, 1944. w. P. osGooD BOX OR COVER ENDING MACHINE Filed June 1'7. 1941 3 Sheets-Sheet 1 igea/037%?.

W. P. OSGOOD BX OR COVER ENDING MACHNE Fei. s, 1944.

Enea .June 17, 1941 s Sheets-sheet 2 /...Jgpe'vnn imma;

Feb. 8, 1944. w. P, osGooD BOX OR COVER ENDING MACHINE 3 Sheets-Shet 3 Filed June 17. 1941 Patented Feb. 8, 1944 1 UNITED STATES ATENT yOFFICE-v BOX OR COVER ENDING MACHINE Walter P. Osgood, Malden, Mass., assignor to Boston Machine Works Company, Lynn, Mass., a corporation of Massachusetts Application June 17, 1941, Serial No. 398,447

8 Claims.

This invention relates to a coating mechanism, and more particularly to a mechanism designed for use in applying a coating or film of liquid cement to certain areas of cardboard box blanks in the course of making up boxes and covers from such blanks. The coating mechanism herein described is intended for use in conjunction with pressing mechanism such as is described in my copending application Serial No. 448,366, led June 25, 1942, such pressing mechanism being designed to press the coated areas of the box or cover blank against other areas to promote firm adhesion.

The various features of the present invention will be readily understood from an inspectionof the accompanying drawings illustrating the best form of the invention at present known to the inventor, in which,

Fig. 1 is a detail view in sectional plan of the coating part of the machine, the pressure roll having been taken away to show underlying parts;

Fig. 2 is a detail view in sectional elevation on the line 2 2, Figure 1;

Figure 3 is a detail view in right-side sectional elevation on the line 3 3, Figure 1;

Figure 4 is an enlarged detail View in rightside sectional elevation showing the bearings for the shaft upon which the pressure roll is mounted;

Figure 5 is a detail view in front sectional elevation on the line 5 5, Figure 3;

Figure 6 is a detail View in front sectional elevation on the line 6 6, Figure 3, and

Figure 7 is a detail view in front sectional elevation of a portion of the drive for the pressing roll.

The embodiment of the invention illustrated in the drawings comprises a horizontal work table 38 along which the operator may slide successive box or cover blanks to ride over a doctor 39 which is secured to the right-hand rim of a trough 49a (Figure 6) into the bite between a lower coating roll 4| and an upper pressure roll 42. blanks pass out over the left-hand rim of the trough 46a. This trough projects from and communicates with a heated glue pot 40 (Figure 3). 'Ihe coating roll 4| which is composed of three solid pieces of steel 43, is secured to the forward 1 portion of a shaft 44- journalled in stationary bearings 45 and 46 journalled in the upper portion of the hot glue pot 4i). The shaft 44 is provided with a belt pulley 4`| which is driven by a belt 48 on the small pulley 49 secured to the f' From the delivery side of these rolls the armature shaft 5l) of an electric motor 5|. The motor 5| is bolted to a platform 52 which is secured in the upper portions of three rods 53. the lower portions of which are secured to a platform secured to a lateral extension 54 of a ring 55.

vThe glue .pot 46 is supported by a jacket |66 which is mounted on a ring 56 secured eccentrically, (Figure 1), on a rod 5`| depending therefrom. The rod 5l passes vertically through the duplex ends 66 of a girder 6|, having opposite ends like the ends 6l) adjustably secured to a vertical standard (not shown) which may be conveniently secured to the frame of a pressing mechanism.

The pressure roll 42 (Figure 3), is a piece of a Bakelite tube 61, the front end of which is mountedon a cylindrical bushing 68 with the front end of the bushing held in engagement with the front end of the tube. The bushing 68 is secured to a shaft 69, the front end of which is mounted in a journal 'Hl secured to the front end of a hood or canopy which supports the roll 42 and is rockably mounted so that the roll 42 can yield upwardly away from the roll 4| to accommodate work of different thicknesses. The rear end of the pressure roll 42 is secured to the peripheral edge of a cylindrical bushing '|2 secured to the shaft 69.

The rear end of the shaft 69 passes ireehT through a collar 13 mounted in the canopy 1|. A gear 'I4 is secured to the end of the shaft 69 adjacent the collar 13. The center portion of the shaft 69 is journalled in a bearing mounted within the canopy "H, there being a collar 'i5 secured to the shaft 69 interposed between the bearing and the bushing l2. `For proper operation it is essential that the'rolls 4| and 42 be parallel As the rolls are independently supported, accurateparallelism of their 'shafts cannot be depended on in actual manufacture of the machines. Hence provision is made for suiciently adjusting the axis of the roll 42 so that it can be made accurately parallel with the axis of the roll 4|. As can 'be seen in Figure 3, the outer or front portion of thev canopy 1i, which longitudinally spans the roll 42, is so formed as to be capable of being slightly sprung with respect to the heavier body portion of the canopy. Suitable adjustment of the roll 4Z is made by means of a pair of vtruss rods 'i6 one of which is shown in Figure 3. The ends of these truss rods are anchored in upstanding ears vwhich rise from the canopy'll immediately above the shaft bearingsadjacent to the ends ofthe roll 42. The anchoring means consists of nuts 11 and 18 threaded on the rods 15, by manipulation of which the outer end of the roll 02 may be adjustably sprung up or down to bring the axis of the roll into exact parallelism with that of the roll 4|. In order to avoid undesirable binding of the shaft 69 when it has thus been sprung with the roll 42, the journals (Figure 4) adjacent to the ends of the roll 42 are externally tapered so that they can adjust themselves to slight changes in the shaft axis. These journals are held against rotation and axial shifting by suitable means such asscrews 19 which permit them to rock slightly.

The glue pot 40 is provided with -acover ,tl which is hinged to the pot as at 80. The canopy 1| is hinged to the pot cover 8| on an axis parallel to the roll axes and on Ithe delivery side o the rolls, a shaft 86 serving as the hinge pin. The shaft 86 is journaled in a pair of bearing members 8|a which .extendup from and area part f-ofthe cover 8|. When the machine is in operation,'the-cover'8| is locked shut'by a pair of screws 82 extending from the front wall of the pot 40 through notches 83 infthe'front marf gin of the cover and provided with wing-nuts '84 as shown in Figures 1 and 5. Pinned on the shaft-80 are two collars 81 and 88 between which Yis-'confined a gear -83 rotatable on the shaft. 'The gear 89 meshes-with the gear 14 and also with another gear which is mounted on a shaft 9| journaled in a pair of bearing memf'bers =92 whichextend up from the glue pot cover 8|. Also mounted Ion the shaft 9| is a gear 93 which meshes with the pinion 94 on the yshaft 44.

Since the shaft .69 (which is supported by the canopy 1|) is parallel'to-the shaft 8-about :which the canopy is hinged, thevgear 14 always lremains meshed with the gear 89 for-any posiftion yof the .canopy 1|.

vAs is-evidentffrom Figure', duringthe operaltion of the'mechanism the upper rollv 42 rotates in a clockwise direction, the lower roll 0| and the shaft ilrotating in a counter-clockwise direction. :If anything should tend to hold the yupper roll against rotation, such as a piece of -work of extra thickness wedged inthebite between the rolls, the counterclockwise rotation of thepinion 89 (Figure '7) tends to elevate the .pinion 14 and thus to lift the roll 42 away from the rollI 4|. When a piece of work'is fed between the rolls 4| and |12, the upper roll 42 yields upwardly against the weight of the canopy 1| and all the parts carried thereby. Preferably the downward pressure of the canopy 1| is augmented by additional means such rfas a scrollspring AS31 one end of which is caught in a slot 90 in an extension 95 of the collar f88, the other end of the spring being attached tothe canopy 1| as at 98. A denite adjustable limit canbe put on'the upward yielding'movement of the roll 42 by means of 'a screw 99 threaded into the cover 8| and Alocked'in adjusted position by a lock-nut |00. Thescrewhas ahead I0! which is engaged by a notched ear |02 on the canopy 1| when the canopyireaches the permissible limit of its upward movement. The -downward'movement of the canopy 1| and roll'42, or in othei` words the clearance between rolls 4| and 52, is adjustably limited by a screw l|703 (Figures 1 and 6) which is set'into the wall of the glue pot 40 and is engagedby the canopy 1| at a point remote from the hinge axis '86. Provision is made of means for preventing actual contact between the rolls 4| and 42 in case the limit screw |03 is set down too far. Suchmeans comprises a stop element (Figure 3) which may consist of a screw secured in the pot cover 8| and engageable by the canopy 1| before the roll 42 can touch the roll 4|.

The tension of the spring 91 can be regulated by angular adjustment ofthe normally stationary shaft 86. To turn the shaft 85 a suitable tool may be inserted in a hole |04 in the shaft for use as a lever, the shaft being held in adjusted angular position by means of a setscrew |05 (Figure `5) The pot 40, containing the glue which has a water solvent, is surrounded partially by a jacket |05 (Figure 5), of hot water. The water is heated by a heating element |01 extending horizontally from a control box |08 secured to the ex- A thermostat |09 extends horizontally from the control box. After the glue is heated by the hot water, it is fed to the trough 00a by a horizontal feeding device ||0'.(Fig. -3), secured to a shaft which is packed from'the water jacket |00 and is driven by a belt H2 which passes around a belt pulley H3 onthe shaft and a smaller belt pulley H6 on the armature shaft'50 of the motor 5|. Excess glue delivered by the feed screw ||0 spills back into the pot 40 over a vertically adjustable dam located above the left-hand end of the feed screw ||0 (Figure 3).

The water jacket |06 is providedat its bottom with four screws I5 (Figures 1 and 2), by which the water jacket and its supported glue pot 40 are secured to the ring 55. The glue'pot 40 is provided with a cover plate ||5a (Figure 3), which provides for the removal of debris from the pot, and with a pipe I||6, suitably vpacked f-romfthe jacket |06, which provides for removlingthe glue from the pot.

A drain plug ||1, Secured to'the `jacket |06, is used to drain the water therefrom.

The doctor 39 (Figure 6) is asheet of scarfed metal adjustably mounted on the right-hand rim of the trough 40a substantially in engagement with the upgoing side of the coating roll. A. portion of the gage 31 constitutes the outer Vend wall of the trough 40a and is provided with screws ||1a (Figure 3), which secure thereto a journal ||8 for the coating roll shaft 44. As shown in Figure 3, the outer 'end of the coating roll 0| is hollowed to receive and surround the journal H8. The end of the roll bears at its periphery against the gage 31 and thus prevents access by glue in the trough 40a and on the roll 2| 4to rthe journal ||'8. Thetable 38 is a stationary piece of metal secured to the gage -31 Aby brackets ||9 ('Figurel).

The'coating part of the machine is provided with a"-Sirocco" fan |20 (Figure 3), which is mountedon the end of the armature shaft 50 ofthe electric motor 5| vand which blows cold, oratmospheric, air through the stationary outlet |2| into a pipe |22 having one end thereof secured#Y in Vposition on the movable frame 1| by `a small coupling |23. The coupling |23 delivers the air blown bythe fan |20 centrally upon the pressure roll 42. On its right side (Figure 6), the 4canopy '1| is provided at its lower end with a curved guard plate |20a which is coaxial with the roll'42 and has its bottom spaced from the doctor 39. The guard |200, also acts as a guiding means to conduct the air delivered by the coupling 23'to Athe bite between the rolls `4| and .132. The outlet size of the coupling |23 is'sucient to deliver air to the bite along the length of the roll 42. The roll 4| is a wet roll while the roll d2 is a dry roll, but comes into proximity with the coating roll 4I when the work is coated and is removed from the coating part of the machine. The fan |20, by blowing atmospheric air upon the pressure roll 42, which is conducted to the bite between the coating roll lll and the pressure roll Z, provides means for preventing the condensation thereon of vapors coming from the heated coating compound.

Nothing herein explained is to be interpreted as limiting the various features of the present invention in the scope of its application to use in connection with the particular machine or the particular mode of operation or both selected for purposes of illustration and explanation. While the particulars of construction herein set forth are Well suited to one mechanical form of the invention and to the use to which it is put, it is not limited to this use, nor to these details of construction, nor to the conjoint use of all its features, nor is it to be understood that these particulars are essential since they may be modified Within the skill of the artisan without departing from the true scope of the actual invention, characterizing features of which are set forth in the following claims by the intentional use of generic terms and expressions inclusive of various modications.

What is claimed as new, is:

l. In acoating machine,a trough having an end wall, a journal secured within said trough to said end wall, a shaft having one end rotatable in said journal, and a roll mounted on said shaft and having an end hollowed to receive and surround said journal, said roll end being in engagement with said end wall of the trough.

2. In a coating machine, a pair of rotatable rolls, means for supporting said rolls one above the other in closely spaced relation, means for supplying a iilrn of moist coating material to the lower roller, and means for maintaining an air flow over the surface of the upper roll whereby to prevent precipitation of moisture thereon.

3. In a coating machine, a pair of rotatable rolls, means for supporting said rolls one above the other in closely spaced relation, means for maintaining a lm of moist coating material on the lower of said rolls, a canopy over the upper roll, and means for maintaining an air iiow under said canopy and against said upper whereby to prevent condensation of moisture on said upper roll.

4. In a coating machine, a pair of rotatable rolls, means for supporting said rolls one above the other in closely spaced relation, the support means for the upper roll including a canopy over said upper roll having bearings for said upper roll, means on said canopy for adjusting the axis of said upper roll, means for supplying an air ow between said canopy and upper roll, and means for maintaining a film of moist coating material on said lower roll.

5. In a coating machine, a pair of rotatable rolls, means for supporting said rolls one above the other in closely spaced relation, said means including stationary bearings for the lower roll, a canopy over said upper roll hinged on an axis parallel to the axes of the rolls, bearings for the upper roll on the under side of said canopy, adjustable stop means for limiting the rocking movement of said canopy about its hinge axis whereby to regulate the spacing between said rolls, and means for driving said rolls at equal peripheral speeds and in opposite directions.

6. In a coating machine, a pair of rotatable rolls, means for supporting said rolls one above the other in closely spaced relation, and means for driving said rolls at equal peripheral speeds and in opposite directions so as to feed work through the nip of the rolls to the delivery side thereof, said supporting means including stationary bearings for the lower roll, a canopy over the upper roll hinged on an axis parallel to the roll axes and oset on the delivery side of the rolls, and bearings for the upper roll on the under side of said canopy, said driving means including a pinion coaxial with the upper roll and rotatable therewith, a second pinion rotatable about the hinge axis of the canopy and in mesh with the nrst-mentioned pinion and common means for driving said lower roll and said second pinion.

'7. In a coating machine, a pair of rotatable rolls, means for supporting said rolls one above the other in closely spaced relation, means for driving said rolls at equal peripheral speeds and in opposite directions so as to feed work through the nip of the rolls to the delivery side thereof, said supporting means including stationary bearings for the lower roll, a canopy over the upper roll hinged on an axis parallel to the roll axes and offset on the delivery side of the rolls, and bearings for the upper roll on the under side of said canopy, said driving means including a pinion coaxial with the upper roll and rotatable therewith, a second pinion rotatable about the hinge axis of the canopy and in mesh with the first-mentioned pinion and common means for driving said lower roll and said second pinion, and spring means acting on said canopy in a direction to press the upper roll toward the lower roll.

8. In a coating machine, a pair of rotatable rolls, means for supporting said rolls one above the other in closely spaced relation, means for driving said rolls at equal peripheral speeds and in opposite directions so as to feed work through the nip cf the rolls to the delivery side thereof, said supporting means including stationary bearings for the lower roll, a canopy over the upper roll hinged on an axis parallel to the roll axes and offset on the delivery side of the rolls, and bearings for the upper roll on the under side of said canopy, said driving means including a pinion coaxial with the upper roll and rotatable therewith, a second pinion rotatable about the hinge axis of the canopy and in mesh with the mst-mentioned pinion and common means for driving said lower roll and said second pinion, means for maintaining a film of moist coating material on the lower roll, and means for maintaining a substantial air ow between said canopy and upper roll to prevent condensation on said upper roll.

WALTER. P. OSGOOD. 

